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// RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection -analyzer-config unroll-loops=true -analyzer-stats -verify -std=c++11 %s
void clang_analyzer_numTimesReached();
int getNum();
void foo(int &);
// Testing for loops.
int simple_unroll1() {
int a[9];
int k = 42;
for (int i = 0; i < 9; i++) {
clang_analyzer_numTimesReached(); // expected-warning {{9}}
a[i] = 42;
}
int b = 22 / (k - 42); // expected-warning {{Division by zero}}
return 0;
}
int simple_unroll2() {
int a[9];
int k = 42;
int i;
for (i = 0; i < 9; i++) {
clang_analyzer_numTimesReached(); // expected-warning {{9}}
a[i] = 42;
}
int b = 22 / (k - 42); // expected-warning {{Division by zero}}
return 0;
}
int simple_no_unroll1() {
int a[9];
int k = 42;
for (int i = 0; i < 9; i++) {
clang_analyzer_numTimesReached(); // expected-warning {{4}}
a[i] = 42;
foo(i);
}
int b = 22 / (k - 42); // expected-warning {{Division by zero}}
return 0;
}
int simple_no_unroll2() {
int a[9];
int k = 42;
int i;
for (i = 0; i < 9; i++) {
clang_analyzer_numTimesReached(); // expected-warning {{4}}
a[i] = 42;
i += getNum();
}
int b = 22 / (k - 42); // expected-warning {{Division by zero}}
return 0;
}
int simple_no_unroll3() {
int a[9];
int k = 42;
int i;
for (i = 0; i < 9; i++) {
clang_analyzer_numTimesReached(); // expected-warning {{4}}
a[i] = 42;
(void)&i;
}
int b = 22 / (k - 42); // no-warning
return 0;
}
int simple_no_unroll4() {
int a[9];
int k = 42;
int i;
for (i = 0; i < 9; i++) {
clang_analyzer_numTimesReached(); // expected-warning {{4}}
a[i] = 42;
int &j = i;
}
int b = 22 / (k - 42); // no-warning
return 0;
}
int simple_no_unroll5() {
int a[9];
int k = 42;
int i;
for (i = 0; i < 9; i++) {
clang_analyzer_numTimesReached(); // expected-warning {{4}}
a[i] = 42;
int &j{i};
}
int b = 22 / (k - 42); // no-warning
return 0;
}
int nested_outer_unrolled() {
int a[9];
int k = 42;
int j = 0;
for (int i = 0; i < 9; i++) {
clang_analyzer_numTimesReached(); // expected-warning {{16}}
for (j = 0; j < getNum(); ++j) {
clang_analyzer_numTimesReached(); // expected-warning {{15}}
a[j] = 22;
}
a[i] = 42;
}
int b = 22 / (k - 42); // no-warning
return 0;
}
int nested_inner_unrolled() {
int a[9];
int k = 42;
int j = 0;
for (int i = 0; i < getNum(); i++) {
clang_analyzer_numTimesReached(); // expected-warning {{4}}
for (j = 0; j < 8; ++j) {
clang_analyzer_numTimesReached(); // expected-warning {{32}}
a[j] = 22;
}
a[i] = 42;
}
int b = 22 / (k - 42); // expected-warning {{Division by zero}}
return 0;
}
int nested_both_unrolled() {
int a[9];
int k = 42;
int j = 0;
for (int i = 0; i < 7; i++) {
clang_analyzer_numTimesReached(); // expected-warning {{7}}
for (j = 0; j < 6; ++j) {
clang_analyzer_numTimesReached(); // expected-warning {{42}}
a[j] = 22;
}
a[i] = 42;
}
int b = 22 / (k - 42); // expected-warning {{Division by zero}}
return 0;
}
int simple_known_bound_loop() {
for (int i = 2; i < 12; i++) {
// This function is inlined in nested_inlined_unroll1()
clang_analyzer_numTimesReached(); // expected-warning {{90}}
}
return 0;
}
int simple_unknown_bound_loop() {
for (int i = 2; i < getNum(); i++) {
clang_analyzer_numTimesReached(); // expected-warning {{10}}
}
return 0;
}
int nested_inlined_unroll1() {
int k;
for (int i = 0; i < 9; i++) {
clang_analyzer_numTimesReached(); // expected-warning {{9}}
k = simple_known_bound_loop(); // no reevaluation without inlining
}
int a = 22 / k; // expected-warning {{Division by zero}}
return 0;
}
int nested_inlined_no_unroll1() {
int k;
for (int i = 0; i < 9; i++) {
clang_analyzer_numTimesReached(); // expected-warning {{26}}
k = simple_unknown_bound_loop(); // reevaluation without inlining
}
int a = 22 / k; // no-warning
return 0;
}
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